243702889 has 2 divisors, whose sum is σ = 243702890. Its totient is φ = 243702888.

The previous prime is 243702883. The next prime is 243702929. The reversal of 243702889 is 988207342.

It is a happy number.

243702889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240870400 + 2832489 = 15520^2 + 1683^2 .

It is a cyclic number.

It is not a de Polignac number, because 243702889 - 2³ = 243702881 is a prime.

It is not a weakly prime, because it can be changed into another prime (243702881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121851444 + 121851445.

It is an arithmetic number, because the mean of its divisors is an integer number (121851445).

Almost surely, 2^243702889 is an apocalyptic number.

It is an amenable number.

243702889 is a deficient number, since it is larger than the sum of its proper divisors (1).

243702889 is an equidigital number, since it uses as much as digits as its factorization.

243702889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 243702889 is about 15610.9861635965. The cubic root of 243702889 is about 624.6262418123.

The spelling of 243702889 in words is "two hundred forty-three million, seven hundred two thousand, eight hundred eighty-nine".